65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
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// Copyright Cromwell D. Enage 2019.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_PARAMETER_AUX_IS_PLACEHOLDER_HPP
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#define BOOST_PARAMETER_AUX_IS_PLACEHOLDER_HPP
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#include <boost/parameter/config.hpp>
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#if defined(BOOST_PARAMETER_CAN_USE_MP11)
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#include <boost/mp11/integral.hpp>
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#else
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#include <boost/mpl/bool.hpp>
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#endif
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namespace boost { namespace parameter { namespace aux {
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template <typename T>
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struct is_mpl_placeholder
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#if defined(BOOST_PARAMETER_CAN_USE_MP11)
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: ::boost::mp11::mp_false
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#else
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: ::boost::mpl::false_
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#endif
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{
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};
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}}} // namespace boost::parameter::aux
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#include <boost/mpl/arg_fwd.hpp>
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namespace boost { namespace parameter { namespace aux {
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template <int I>
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struct is_mpl_placeholder< ::boost::mpl::arg<I> >
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#if defined(BOOST_PARAMETER_CAN_USE_MP11)
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: ::boost::mp11::mp_true
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#else
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: ::boost::mpl::true_
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#endif
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{
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};
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}}} // namespace boost::parameter::aux
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#if defined(BOOST_PARAMETER_CAN_USE_MP11)
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#include <boost/mp11/bind.hpp>
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namespace boost { namespace parameter { namespace aux {
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template <typename T>
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struct is_mp11_placeholder : ::boost::mp11::mp_false
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{
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};
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template < ::std::size_t I>
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struct is_mp11_placeholder< ::boost::mp11::mp_arg<I> >
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: ::boost::mp11::mp_true
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{
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};
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}}} // namespace boost::parameter::aux
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#endif // BOOST_PARAMETER_CAN_USE_MP11
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#endif // include guard
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